1. Industrial byproducts

2. Industrial byproducts
Pozzolanic are siliceous materials which possess no cementitious properties but in the presence of water, chemically react with calcium hydroxide liberated on hydration to form compounds, possessing cementitious properties.
Pozzolana + Ca(OH)2 + water C-S-H (gel)

3. Pozzolanic materials Fly ash Blast Furnace Slag Silica fume
Rice husk ash

4. Fly Ash
Fly ash is finely divided residue resulting from the combustion of powdered coal

5. ASTM Classification Class F Has less than 5% CaO Class C
Has more than 10% CaO
Also possesses cementitious properties

6. Physical requirements
Characteristic
Grade I
Grade II
Fineness (m2/kg)
320
250
Compressive strength
Not less than 80% of the strength of corresponding plain cement mortar cubes
Soundness (%)
0.8

7. Blast Furnace Slag GGBS ( Ground Granulated Blast Slag )
A waste product from blast furnaces